We are seeking a Principal Applied Scientist to lead the design, training, optimization, and deployment of large-scale AI models, including LLMs and agentic systems for advertising. This role focuses on scalable model architectures, efficient inference, and agentic capabilities that drive high-impact ad solutions. As a technical leader, you will shape strategic AI initiatives in ad retrieval, creative generation, relevance, and safety, while advancing the frontier of scalable and agent-driven AI systems.

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.